SC Filed 2022-01-14 Event — SEC 0000935836-22-000017 →

EcoR1 Capital, LLC → PROTHENA CORP PUBLIC LTD CO PRTA

Stake: — Shares: —

Item 4 — Purpose of Transaction

Not extracted from this filing — typically because it's an amendment (13D/A) and Item 4 is unchanged from the parent filing. Read the raw SEC filing →

Cross-References

Insider Activity (last 365d)

1 transaction

1 buys · 0 sales · 0 awards/exercises

Issuer Cluster

2 13D/G filings on this issuer

1 other filing besides this one

Filer Track Record

9 filings by this filer

8 other filings in the data moat

Short Interest · settle 2026-03-31

DTC 12.32

7,016,080 shares short · -0.4% vs prior

Form 4 Insider Transactions · last 365d

Date	Insider	Role	Type	Shares	Price	Value
2026-04-10	Kingston Anne Evans	officer	Award	100,000	$10.50	$1.05M

Other 13D/G Filings on PROTHENA CORP PUBLIC LTD CO

Filed	Form	Filer	Stake	Shares
2025-01-03	SCHEDULE	EcoR1 Capital, LLC	21.50%	11,584,280	view →

Other Filings by EcoR1 Capital, LLC

Filed	Form	Issuer	Stake	Shares
2025-05-19	SCHEDULE	GALAPAGOS NV GLPGF	11.84%	7,803,202	view →
2025-03-17	SCHEDULE	Zymeworks Inc. ZYME	24.20%	16,858,418	view →
2025-02-18	SCHEDULE	Zymeworks Inc. ZYME	22.80%	15,720,161	view →
2025-01-13	SCHEDULE	Zymeworks Inc. ZYME	22.40%	15,411,078	view →
2025-01-03	SCHEDULE	PROTHENA CORP PUBLIC LTD CO PRTA	21.50%	11,584,280	view →
2024-10-08	SC	GALAPAGOS NV GLPGF	—	—	view →
2021-05-11	SC	ANAPTYSBIO, INC ANABV	—	—	view →
2021-04-13	SC	ANAPTYSBIO, INC ANABV	—	—	view →

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